I recently bought another API nitrate test because I had questions whether or not the one from my all in one kit was still reading good. Well I tested the same water with both tests and they came out exactly the same, but one difference was the cards color was a bit different. So reading form my multitest card my nitrates are at 40ppm but only 20ppm on the 1 test card. Which one do you guys think is correct?

jeaninel

10-28-2010 02:18 AM

Comparing it to mine the one on the right looks correct to me. The one on the left might be for saltwater?

Romad

10-28-2010 05:49 AM

The one on the right is the one i'd go by. It looks the same as what I use.

zof

10-28-2010 08:18 PM

Alright thanx, I will confirm that it is a freshwater card, so maybe that card was printed bad.